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// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package command
import (
"fmt"
"os"
"strings"
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/codegangsta/cli"
"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
"github.com/coreos/etcd/client"
)
func NewMemberCommand() cli.Command {
return cli.Command{
Name: "member",
Usage: "member add, remove and list subcommands",
Subcommands: []cli.Command{
cli.Command{
Name: "list",
Usage: "enumerate existing cluster members",
Action: actionMemberList,
},
cli.Command{
Name: "add",
Usage: "add a new member to the etcd cluster",
Action: actionMemberAdd,
},
cli.Command{
Name: "remove",
Usage: "remove an existing member from the etcd cluster",
Action: actionMemberRemove,
},
},
}
}
func mustNewMembersAPI(c *cli.Context) client.MembersAPI {
eps, err := getEndpoints(c)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
tr, err := getTransport(c)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
hc, err := client.NewHTTPClient(tr, eps)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
if !c.GlobalBool("no-sync") {
ctx, cancel := context.WithTimeout(context.Background(), client.DefaultRequestTimeout)
err := hc.Sync(ctx)
cancel()
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
}
if c.GlobalBool("debug") {
fmt.Fprintf(os.Stderr, "Cluster-Endpoints: %s\n", strings.Join(hc.Endpoints(), ", "))
}
return client.NewMembersAPI(hc)
}
func actionMemberList(c *cli.Context) {
if len(c.Args()) != 0 {
fmt.Fprintln(os.Stderr, "No arguments accepted")
os.Exit(1)
}
mAPI := mustNewMembersAPI(c)
ctx, cancel := context.WithTimeout(context.Background(), client.DefaultRequestTimeout)
members, err := mAPI.List(ctx)
cancel()
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
for _, m := range members {
fmt.Printf("%s: name=%s peerURLs=%s clientURLs=%s\n", m.ID, m.Name, strings.Join(m.PeerURLs, ","), strings.Join(m.ClientURLs, ","))
}
}
func actionMemberAdd(c *cli.Context) {
args := c.Args()
if len(args) != 2 {
fmt.Fprintln(os.Stderr, "Provide a name and a single member peerURL")
os.Exit(1)
}
mAPI := mustNewMembersAPI(c)
url := args[1]
ctx, cancel := context.WithTimeout(context.Background(), client.DefaultRequestTimeout)
m, err := mAPI.Add(ctx, url)
cancel()
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
newID := m.ID
newName := args[0]
fmt.Printf("Added member named %s with ID %s to cluster\n", newName, newID)
ctx, cancel = context.WithTimeout(context.Background(), client.DefaultRequestTimeout)
members, err := mAPI.List(ctx)
cancel()
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
conf := []string{}
for _, m := range members {
for _, u := range m.PeerURLs {
n := m.Name
if m.ID == newID {
n = newName
}
conf = append(conf, fmt.Sprintf("%s=%s", n, u))
}
}
fmt.Print("\n")
fmt.Printf("ETCD_NAME=%q\n", newName)
fmt.Printf("ETCD_INITIAL_CLUSTER=%q\n", strings.Join(conf, ","))
fmt.Printf("ETCD_INITIAL_CLUSTER_STATE=\"existing\"\n")
}
func actionMemberRemove(c *cli.Context) {
args := c.Args()
if len(args) != 1 {
fmt.Fprintln(os.Stderr, "Provide a single member ID")
os.Exit(1)
}
mAPI := mustNewMembersAPI(c)
mID := args[0]
ctx, cancel := context.WithTimeout(context.Background(), client.DefaultRequestTimeout)
err := mAPI.Remove(ctx, mID)
cancel()
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}
fmt.Printf("Removed member %s from cluster\n", mID)
}
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